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Autostereoscopic Display

27 Feb

Technology is ever evolving. A new technology comes in a particular field one day; the next day, we find it in the cold bag, substituted by a newer and better technology.

In the field of mobile displays, the above made statement stands as true as sunrise every morning. When new technologies including AMOLED, Super AMOLED and Super AMOLED Plus displays are incorporated in today’s smartphones, a unique autostereoscopic display has been introduced in a few smartphones to bestow the users with glass-free 3D effect for still images and videos.

Autostereoscopic Display is a technology that enables you to view stereoscopic (3D) images without the help of head gears or glasses designed especially for the purpose.  In simpler terms, it is 3D viewing without any additional hassles. At the present moment high end smartphones like HTC Evo 3D sports this feature as does the legendry gaming console called Nintendo 3D. 

Image

There are two different methods to lend 3D effects for the viewers- Parallax barrier and Lenticular array.

In the parallax barrier technology, a second layer for LCD is placed above the main LCD display that acts like a light barrier, blocking certain pixel from reaching a particular eye of the user. The effect is precise only when the viewer’s face is located at a specific distance and angle from the screen. The exact position where, the parallax barrier gives best 3D viewing results is known as “sweet spot”. When the viewer moves away from the sweet spot, the wrong pixels get blocked, resulting in failure in 3D perception.

In Lenticular display, an array of lenticular lens is placed on the LCD. It is designed in such a way that different areas of screen are magnified and refracted in the direction of viewers’ eyes. This technology allows 3D perception at various viewing angles, that means, multiple “sweet spots’ are created along a horizontal viewing angle. Though HTC has not revealed the exact technology involved in the autostereoscopic display of Evo 3D, the product enables viewing 3D images and videos from multiple “sweet spots”, so it could be using lenticular array to enable stereoscopy.

The readers should note that the technology was pretty exorbitant in the past and continues to be the same at the present time. But as they say, quality never comes cheap!

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Posted by on February 27, 2012 in Uncategorized

 

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